{"product_id":"missing-numbers-to-120-back-to-school-mystery-detective-grades-1-2-detective-mystery","title":"Missing Numbers to 120 | Back to School Mystery | Grades 1–2 | Detective Mystery","description":"\u003cp\u003eMissing numbers to 120 worksheets for 1st grade: three CSI Mini Mystery Detective math cases where students write the number before and after, then cross a suspect off the lineup until the culprit is left. One case runs to 100 and two to 120, so counting practice is built in from the first week back, and every answer matches one suspect only. Back to school math activities for August and September, then morning work, math centers, early finishers and sub plans whenever number order slips.\u003c\/p\u003e\n\n\u003cp\u003eThe first week of first grade is for finding out who can count past a ten without the chart on the wall, and this does it without anything that looks like a test. Students fill the gaps, match the numbers to a suspect and cross the name off, so they keep going for the culprit. Three CSI Mini Mystery Detective math cases, three mornings, answer keys included.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe Cases\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Teachers Lunchbox\u003c\/strong\u003e - gone, and nobody saw a thing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Missing Teacher\u003c\/strong\u003e - a teacher has disappeared\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe Missing Art Supplies\u003c\/strong\u003e - the art cupboard is emptied\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Inside\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eThree case files, each with a crime sheet and its own lineup of suspects\u003c\/li\u003e\n  \u003cli\u003eMissing numbers before and after, to 100 on one case and to 120 on the others\u003c\/li\u003e\n  \u003cli\u003eNumber sequences printed with gaps for students to fill in\u003c\/li\u003e\n  \u003cli\u003eEach answer matches one suspect and no other, so the page checks itself\u003c\/li\u003e\n  \u003cli\u003eA full answer key for every case\u003c\/li\u003e\n  \u003cli\u003ePrint and go: no cutting, no laminating, nothing to prepare\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is a CSI Mini Mystery Detective?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA CSI Mini Mystery Detective hands your class a crime and a lineup and asks them to solve it with math. Work the crime sheet, match each answer to the suspect carrying that number, cross the name off, and keep going until one suspect has not been ruled out. Because the elimination only works when the numbers are right, these detective activities make students check themselves in a way math worksheets rarely do. One case takes about a class period, with nothing to prepare.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen to Use This Resource\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eAugust and September is where this belongs, in the first weeks back when the counting sequence has gone soft over the summer and you need to see who has kept it. The set tells you that quickly, because a student who cannot go past 109 will cross off the wrong suspect and know it straight away. It is a check on the skill that does not feel like a test to the child sitting it.\u003c\/p\u003e\n\n\u003cp\u003eUse it for test prep, homework, math centers, morning work, early finishers, sub plans and homeschool lessons, with a whole class, a small group or one student alone.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGrade Levels\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWritten for 1st grade, where counting to 120 sits in the standards, and used with 2nd graders as a start of year check. Kindergarten classes take the case that stops at 100 once they are confident past fifty.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Teachers Love These Cases\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eShows you fast which students lose the sequence at the tens\u003c\/li\u003e\n  \u003cli\u003eStudents find their own mistakes as the suspects come off\u003c\/li\u003e\n  \u003cli\u003eNo prep in the busiest weeks of the year\u003c\/li\u003e\n  \u003cli\u003eWorks with a whole class, a small group, partners, or one student alone\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLove this resource?\u003c\/p\u003e\n\n\u003cp\u003eFollow Kiwiland Education to discover more CSI Mini Mystery Detective cases, no-prep math activities, and detective-themed printables for elementary classrooms.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/www.teacherspayteachers.com\/Sellers-Im-Following\/Add\/Kiwiland\" target=\"_blank\" rel=\"noopener\"\u003eFollow Kiwiland Education on TPT ↗\u003c\/a\u003e\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":62005465055602,"sku":"10067300","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/missing-numbers-to-120-before-and-after-worksheets-10067300.jpg?v=1792461527","url":"https:\/\/kiwilandeducation.com\/products\/missing-numbers-to-120-back-to-school-mystery-detective-grades-1-2-detective-mystery","provider":"Kiwiland Education","version":"1.0","type":"link"}